package com.example.reggie.controller;

import com.example.reggie.common.Result;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.file.Path;
import java.util.UUID;

@RequestMapping("/common")
@RestController
public class CommonController {
    @Value("${reggie.path}")
    private String basePath;

    @PostMapping("/upload")
    Result<String> upload(MultipartFile file){
        String suffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf("."));
        File newFile = new File(basePath+ UUID.randomUUID().toString()+suffix);
        //创建一个目录对象
        File dir = new File(basePath);
        //判断当前目录是否存在
        if(!dir.exists()){
            //目录不存在，需要创建
            dir.mkdirs();
        }
        try {
            file.transferTo(newFile);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        return Result.success(newFile.getName());
    }

    @GetMapping("/download")
    void downLoad(String name, HttpServletResponse response){
        try {
            FileInputStream fileInputStream = new FileInputStream(new File(basePath+name));
            ServletOutputStream outputStream = response.getOutputStream();
            response.setContentType("image/jpeg");
            int len = 0;
            byte[] bytes = new byte[1024];
            while ((len = fileInputStream.read(bytes)) != -1){
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }

            // 关闭资源
            outputStream.close();
            fileInputStream.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }


}
